XL10T-35T Timing Belt Pulley Pitch 5.08mm With Step Drive Pulleys Width 11/16mm

Tooth count determines your pulley pitch diameter and, combined with your motor pulley, sets the drive ratio. A smaller tooth count (e.g., 10T) gives a smaller pitch diameter and higher belt speed per motor revolution; a larger count (e.g., 35T) gives a larger pitch diameter and more torque multiplication. Match the tooth count to your required linear speed, torque, and belt length. For CNC and 3D printer axes, 16T–20T on the motor side paired with a matching or larger driven pulley is common.

BF-Type (Blind Flange) pulleys have a flanged hub with a through-bore and one or two set screws to clamp onto the motor shaft. They are the most common choice for stepper and servo motors in CNC and 3D printer applications. K-Type pulleys feature a keyway slot in the bore, which provides a positive mechanical key for higher-torque applications where set-screw retention alone may slip. Choose K-Type when your motor shaft has a matching keyway and you need reliable torque transfer under load.

Standard NEMA 17 stepper motors typically have a 5 mm output shaft — select the 5 mm bore variant. NEMA 23 motors commonly use an 8 mm shaft — select the 8 mm bore. Some NEMA 23 motors ship with a 6.35 mm (1/4 in) shaft, so verify your motor's datasheet before ordering. For servo motors or other shaft sizes, measure the shaft diameter directly and match to the available bore options listed above.

Yes. These pulleys conform to the standard XL timing belt profile with a 5.08 mm (0.200 in) pitch and standard tooth geometry. They are fully interchangeable with XL-profile belts from any manufacturer — Gates, Bando, SDP/SI, and generic suppliers. Ensure your belt width matches the pulley tooth width (11 mm or 16 mm) for proper tracking and load distribution.

Aluminum alloy pulleys are well-suited for light-to-medium duty continuous operation typical of CNC routers, 3D printers, laser engravers, and similar machines. The XL belt profile is rated for moderate torque loads. For very high torque or shock-load applications, verify that the belt tension and tooth engagement (number of teeth in mesh) are within the belt manufacturer's rated limits. Aluminum pulleys are not recommended for heavy industrial drives where steel pulleys would be specified.

Aluminum alloy naturally forms a thin oxide layer that provides good corrosion resistance in typical indoor workshop and laboratory environments. For applications exposed to moisture, cutting fluids, or mild chemicals, the natural oxide layer is generally sufficient. If your environment is highly corrosive (salt spray, strong acids or bases), consider additional protective coatings or consult the finish specification for your chosen variant.

Yes, provided you match three parameters: (1) tooth count — must be identical to the pulley being replaced; (2) bore diameter — must match your motor or driven shaft; (3) hub style — BF-Type or K-Type must match your shaft retention method. Tooth width (11 mm or 16 mm) should also match your existing belt width. If all three match, these are drop-in replacements with no modification required.